Thrashing-cylinder



(No Model.)

G. FRANTZ.

THRASHING CYLINDER. No. 449,438. Patented Mar. 31,4891.

GMM/wmf UNITED STATES PATENT OFFICE.

CHRISTIAN FRANTZ, OF W'AYNESBOROUGII, PENNSYLVANIA.

THRASHING-CYLINDER.

SPECIFICATION forming part of Letters Patent No. 449,438, dated March31, 1891.

Application filed September 29, 1890. Serial No. 366,472. (No model.)

To all whom, it may concern:

Be it known that I, CHRISTIAN FRANTZ, a citizen of the United States,residing at Waynesborough, in the county of Franklin, State ofPennsylvania, have invented certain new and useful Improvements in'Ihrashing-Cylinders, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements inthrashing-cylinders and teeth for the same, more particularly to themeans of securing the teeth to the cylinder. It has for its objects,among others, to

provide astrong, compact, closed cylinder, in which the teeth will beheld fast, the'contact of the straw or grain with the key which fastensthe teeth in place serving to force the said key into the keyway, andthereby causing it to be self-tightening.

Another object is to provide for the ready clinching of the key inplace. I employ a lug of soft metal in such a position that after thekey is in place a slight blow upon. the said lug will cause it to bebent over the end of the keyway, and thus prevent displacement of thekey. Beneath each key I form a pocket, into which I place a block, theouter face of which should be slightly beyond the bottom of the keywayand against which the key impinges. These blocks serve asbalanceweights. I form pockets in the cylinder to receive the cups ofthe head to make a rigid connection between these parts.

Other objects and advantages of the invention will hereinafter appear,and the novel vfeatures thereof will be specifically defined by theappended claims.

The invention is illustrated in the accompanying drawings, which, withthe letters of reference marked thereon, form a part of thisSpecification, and in which- Figure 1 is an end view ofathrashing-cylinder constructed in accordance with my invention with aportion broken away and a part in section. Fig. 2 is a longitudinalsectional detail with parts in elevation and portions broken away. Fig.3 is a perspective detail on a larger scale.

Like letters of reference indicate the same parts in all the views.

Referring now to the details of the drawings by letter, A designates theshaft, to which the cylinder is keyed in any suitable manner; Thecylinder B is formed with pockets or recesses ct in interiorenlargements b, as seen in Fig. 2, into which the cups c on the head Cfit, and to which they are secured by bolts d or other analogous means.This forms a rigid connection and prevents lateral movement of theheads. The cylinder is formed around its periphery with interiorenlargements e or pockets for the reception of blocks D, as seen clearlyin Fig. 2. These neath each tooth, and are of such thickness that whenin place their outer faces are slightly above the outer periphery of thecylinder. These blocks, preferably of wood, are arranged with the grainthereof at an angle to the position of the key, as seen in Fig. Theouter periphery of the cylinder is provided with ribs E, extending inthe direction of the length thereof, and in which at snitable intervalsare formed with dovetailed key ways f, as seen most clearly in Fic". 3.These keyways are formed over theI pockets, in which the blocks arearranged as shown.

E are the teeth, each provided with a basen piece F, which is of a shapeconforming to that of the keyway, as seen, and each key is inserted inthe keyways so that its wider end is forward,'or in the direction ofmovement of the cylinder in operation, so that when in operation thecontact of the grain or straw will serve to more iirmly wedge the teethor keys in place, as will be readily understood. The blocks serve asprops for the keys, forming a sort of cushion and binding the keys moresecurely in their ways.

The ribs E are provided at one corner of the keyway with a notch orrecess g, into which I affix in any suitable manner a lug or piece ofsoft metal h with its edge normally iush with the side of the keyway.After the key is in place in the keyway this piece of soft metal is tobe struck with a hammer or other suitable implement, and bent over theend of the key so as to clinch the same in the keyway in a manner whichwill be readilyT understood. The key thus held is shown in Fig. 2.

p G is a depression in the outer face of the cylinder at a point nearthe small end of the blocks are arranged in these pockets, one be-A IOOKeyway, as shown in Figs. 2 and 3, to receive an instrument to aid inthe removal of the key when necessary.

1. A thrashing-cylinder provided with a dovetail'keyway, a tooth havinga correspondingly-shaped base to engage the keyway, and a block arrangedin a depression or pocket beneath the said base, as set forth.

2. A thrashing-cylinder provided with a dovetail keyway, a block in apocket within the keyway, a tooth having a dovetail base to it thekeyway, and a clinching-lug arranged and operating substantially asspecified.

3. A thrashing-cylinder provided with ribs having dovetail keyways,pockets, and depressions, blocks in the pockets with their outer facesprojecting beyond the face of the keyway, teeth with dovetail bases, anda softmetal lug for each keyway, adapted to be bent against the baseafter the latteris placed in the keyway, substantially as and'for thepurpose specified.

et. A thrashing-cylinder provided With interior enlargements Withpockets, a head having cups tted in said pockets, and securingboltsscrewed into said enlargements with their heads seated in recesses inthe head, as set forth.

In testimony whereof I afiix my signature in presence of two Witnesses.

CHRISTIAN FRANTZ.

Witnesses:

D. H. MCGINLEY, GEO. H. RUSSELL.

